SKU: 90549586307

HKS Super Fire Racing Spark Plug 50003-M40G

$36.82 $40.91
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Description

HKS Super Fire Racing Spark Plug 50003-M40GM Series Super Fire Spark Plugs HKS M Series spark plugs are high performance Iridium plugs designed to provide improved ignition performance, durability and anti carbon build up. 0. 6mm Iridium Alloy Center Electrode Outer Electrode with Platinum Chip Short Type Outer Electrode (Anti Vibration) Thermal Edge Spark Support Gap M Series is recommended for reliable ignition, durability and anti carbon buildup under high load. The Iridium alloy is used

M-Series Super Fire Spark Plugs

HKS M-Series spark plugs are high performance Iridium plugs designed to provide improved ignition performance, durability and anti-carbon build-up.

  • 0.6mm Iridium Alloy Center Electrode
  • Outer Electrode with Platinum Chip
  • Short Type Outer Electrode (Anti-Vibration)
  • Thermal Edge
  • Spark Support Gap

M Series is recommended for reliable ignition, durability and anti-carbon buildup under high load.

The Iridium alloy is used because of its durability and reliability.  On an average plug, a narrow core typically shortens life span of plug but with the intense durability of iridium there is no sacrifice in any longevity.  With a high melting point of 2454 degrees C, opposed to the 1769 degrees C of white gold, the electrode can tolerate the high levels of compression and minor knocking without any deterioration. A nickel coating on the housing also prevents the spark plug from premature deterioration.  The Iridium plugs are available for multiple applications and offered in "colder" heat ranges of 7 and up and specifically for rotary, heat ranges of 9 and up are offered.

Heat Range: NGK # 8
Thread Size: 14mm × 19mm
Wrench Size: 20.8mm

Fits:

1985 - 1989 HONDA ACCORD L4 1.8 ALL From 6/1985 Thru 9/1989 Production Date  CA1 Chassis  Stock Plug/Heat Range: LONG:5
1987 - 1989 HONDA ACCORD L4 2.0 ALL From 5/1987 Thru 9/1989 Production Date  CA5 Chassis  Stock Plug/Heat Range: LONG:5
1988 - 1989 HONDA ACCORD ALL 2.0 A20A3 From 4/1988 Thru 9/1989 Production Date  CA6 Chassis  Stock Plug/Heat Range: LONG:5
1982 - 1987 HONDA PRELUDE L4 1.8 ALL From 11/1982 Thru 4/1987 Production Date  AB83 Chassis  Stock Plug/Heat Range: LONG:6
1983 - 1987 MAZDA 626 L4 2.0 ALL From 10/1983 Thru 2/1987 Production Date  GCEP Chassis  Stock Plug/Heat Range: LONG:6
1993 - 1997 MITSUBISHI DIAMANTE ALL 3.0 6G72 From 1/1993 Thru 1/1997 Production Date  K45 Chassis  Wagon SOHC  Stock Plug/Heat Range: LONG:6
1990 - 1995 MITSUBISHI ECLIPSE ALL 2.0 4G63 From 2/1990 Thru 6/1995 Production Date  D22A Chassis  DOHC  Stock Plug/Heat Range: LONG:6
1990 - 1995 MITSUBISHI ECLIPSE ALL 2.0 4G63 From 2/1990 Thru 6/1995 Production Date  D27A Chassis  Stock Plug/Heat Range: LONG:6
1995 - 1999 MITSUBISHI ECLIPSE ALL 2.0 4G63 From 6/1995 Thru 8/1999 Production Date  D32A Chassis  Stock Plug/Heat Range: LONG:6
1997 - 1999 MITSUBISHI ECLIPSE ALL 2.0 4G63 From 3/1997 Thru 8/1999 Production Date  D38A Chassis  Stock Plug/Heat Range: LONG:6
1992 - 1992 MITSUBISHI LANCER ALL 2.0 4G63 From 10/1991 Thru 1/1994 Production Date  CD9A Chassis  DOHC  Stock Plug/Heat Range: LONG:7
1993 - 1994 MITSUBISHI LANCER ALL 2.0 4G63 From 1/1994 Thru 9/1994 Production Date  CE9A Chassis  DOHC  Stock Plug/Heat Range: LONG:7
1995 - 1995 MITSUBISHI LANCER ALL 2.0 4G63 From 9/1994 Thru 8/1996 Production Date  CE9A Chassis  DOHC  Stock Plug/Heat Range: LONG:7
1996 - 1996 MITSUBISHI LANCER ALL 2.0 4G63 From 8/1996 Thru 12/1997 Production Date  CN9A Chassis  DOHC  Stock Plug/Heat Range: LONG:7
2003 - 2005 MITSUBISHI LANCER ALL 2.0 4G63 From 2/2004 Thru 2/2005 Production Date  CT9A Chassis  DOHC  Stock Plug/Heat Range: LONG:7
1997 - 1998 MITSUBISHI LANCER ALL 2.0 4G63 From 1/1998 Thru 12/1998 Production Date  CP9A Chassis  DOHC  Stock Plug/Heat Range: LONG:7
1999 - 2000 MITSUBISHI LANCER ALL 2.0 4G63 From 1/1999 Thru 1/2001 Production Date  CP9A Chassis  DOHC  Stock Plug/Heat Range: LONG:7
1999 - 2000 MITSUBISHI LANCER ALL 2.0 4G63 From 1/2000 Thru 1/2001 Production Date  CP9A Chassis  Tommi Makinen Edition DOHC  Stock Plug/Heat Range: LONG:7
2001 - 2002 MITSUBISHI LANCER ALL 2.0 4G63 From 2/2001 Thru 3/2002 Production Date  CT9A Chassis  DOHC  Stock Plug/Heat Range: LONG:7
2003 - 2005 MITSUBISHI LANCER ALL 2.0 4G63 From 2/2003 Thru 1/2004 Production Date  CT9A Chassis  DOHC  Stock Plug/Heat Range: LONG:7
1988 - 1991 MITSUBISHI MONTERO V6 3.0 ALL From 9/1988 Thru 1/1991 Production Date  L141/146GW Chassis  Stock Plug/Heat Range: LONG:5
1988 - 1990 MITSUBISHI STARION ALL 2.6 ALL From 5/1988 Thru 10/1990 Production Date  A187A Chassis  Stock Plug/Heat Range: LONG:7
1985 - 1988 SUBARU JUSTY L3 1.2 ALL From 10/1985 Thru 10/1988 Production Date  KA7/KA8 Chassis  Stock Plug/Heat Range: LONG:6
1988 - 1994 SUBARU JUSTY L3 1.2 ALL From 11/1988 Thru 3/1994 Production Date  KA7/KA8 Chassis  Stock Plug/Heat Range: LONG:6
1983 - 1986 TOYOTA CELICA L6 2.8 5MGE From 8/1983 Thru 2/1986 Production Date  MA61 Chassis  Stock Plug/Heat Range: LONG:5
1988 - 1992 TOYOTA LAND CRUISER ALL 4.0 3FE From 8/1988 Thru 8/1992 Production Date  FJ62G/FJ80G Chassis  Stock Plug/Heat Range: LONG:5
1987 - 1990 TOYOTA TERCEL ALL 1.5 3E;3EE From 5/1986 Thru 9/1990 Production Date  EL31 Chassis  Stock Plug/Heat Range: LONG:5
1989 - 1992 VOLKSWAGEN GOLF ALL 1.8 RV From 10/1989 Thru 3/1992 Production Date  E-19RV Chassis  Stock Plug/Heat Range: LONG:6
1989 - 1992 VOLKSWAGEN JETTA ALL 1.8 ALL From 10/1989 Thru 11/1991 Production Date  E-16RV Chassis  Stock Plug/Heat Range: LONG:6
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 90549586307

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4.3 ★★★★★
Based on 1346 reviews
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Verified Purchase
justinmj411
Lexington, US
★★★★★ 5
Great water cup
Size: 40 Ounces, Color: Peony, Size: 40 Ounces, Color: Peony
Love this water cup! I like to use it around the house. I like how much water it holds, because I drink a lot of water. The color selection of these cups is really good too; I went with the peony cup. It is very vibrant and bold in color. I would say as for on the go, they can get pretty heavy if walking with it full of water, so maybe not the best choice if you are travelling by foot and carrying it. One thing I will say is that this keeps the water VERY cold for a long period of time! Definitely good in that aspect. The handle is very pleasant to hold too, as it has a soft silicon-like material along the handle, and feels very sturdy and thick. I do wish that the straw was more clear, but that isnt too hard to replace. If you want a water cup for around the house, I would reccommend
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
A
Verified Purchase
Allison Goar
Houston, US
★★★★★ 5
great purchase
Size: 30 Ounces, Color: Black Chroma
an amazing and gorgeous Stanley! big and keeps drink cold out hot for longer! high quality and worth the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
C
Verified Purchase
Carolyn
Chelsea, US
★★★★★ 5
Great purchase
Size: 40 Ounces, Color: Rose Quartz 2.0
I was a Stanley skeptic. I couldn’t understand what the big deal was or why the internet was freaking out. I saw the video of the Stanley cup surviving the car fire (and I think the ice was still inside). So I tried it. I drink SO much more water now! I love decorating my Stanley with all the fun accessories and it holds a nice amount of water. It feels durable and good quality. I’ve had my Stanley for a year now and I’m even considering getting another so I can have one while the other is being washed. They are easy to clean as well because of the metal inside. There are two issues I’ve had since I got the Stanley cup. Once it was dropped, and the lid broke. Easy to buy more so not the biggest issue. The cup survived the fall just fine, not a mark on it. The other issue I keep having is my lid gets stuck and becomes hard for me to open sometimes. I have a bad thumb and wrist so often I have to have my spouse open it for me. It keeps my water cold all day. If I put ice in before I go to sleep it’s still cold in the morning. I love these cups and would recommend them to anyone looking to drink more water. If you like your water bottle you will drink more water and want to bring it with you.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 28, 2026
S
Verified Purchase
SaltyMango
Lowell, US
★★★★★ 4
Very strong and cute tumbler
Size: 40 Ounces, Color: Rose Quartz 2.0, Size: 40 Ounces, Color: Rose Quartz 2.0
Great quencher to get. I got this for my self and I love it so much. It's super cute and the color I got is a light soft pink. The size is big which is great since I like having enough coffee to last me all day. It keeps my drinks cold and warm or what ever temperature it is for a good amount of time which is great for anyone who is out for long periods of time. The quality overall is very good. The handle is big, comfortable and easy to grip and the quencher fits perfectly on my gym bag. Only downside is that it did get a smudge on it after I removed the paper that it had on the bottom. I tried removing the smudge it feels sticky like glue but it didnt get removed so I had to put a sticker over it to cover it up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
L
Verified Purchase
LisaRose Wright
Louisville, US
★★★★★ 5
This is a great basic protective shower curtain
Color: 1a Peva Clear Premium, Size: 72"W x 72"L (Pack of 1)
This is a great product. It allows me to have a decorative curtain that won’t get water damaged or mildewed. The price point was right on and I will definitely be buying it again. Pros: The thickness is great. Not too flimsy. I was also impressed with the fact that there wasn’t a chemical smell like we often get with plastic curtains. It was very easy to put up and was just the right length to keep the water in the shower while it does a great job protecting the decorative curtain. It also has weights to assist it with hanging correctly. Cons: Make sure to spread it out after your shower to prevent water stains .
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2026

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